java.lang.AssertionError at com.sun.tools.javac.util.Assert.error(Assert.java:126) at com.sun.tools.javac.util.Assert.check(Assert.java:45) at com.sun.tools.javac.code.Types.merge(Types.java:3304) at com.sun.tools.javac.code.Types.intersect(Types.java:3241) at com.sun.tools.javac.code.Types.lub(Types.java:3441) at com.sun.tools.javac.code.Types.lub(Types.java:3359) at com.sun.tools.javac.comp.Attr.condType(Attr.java:1583) at com.sun.tools.javac.comp.Attr.visitConditional(Attr.java:1467) at com.sun.tools.javac.tree.JCTree$JCConditional.accept(JCTree.java:1219) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:605) at com.sun.tools.javac.comp.Attr.visitReturn(Attr.java:1692) at com.sun.tools.javac.tree.JCTree$JCReturn.accept(JCTree.java:1366) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:605) at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:650) at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:666) at com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:1142) at org.netbeans.lib.nbjavac.services.NBAttr.visitBlock(NBAttr.java:82) at com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:891) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:605) at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:650) at com.sun.tools.javac.comp.Attr.visitMethodDef(Attr.java:1039) at org.netbeans.lib.nbjavac.services.NBAttr.visitMethodDef(NBAttr.java:76) at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:778) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:605) at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:650) at com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:4164) at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:4062) at com.sun.tools.javac.comp.Attr.attribClass(Attr.java:3995) at com.sun.tools.javac.comp.Attr.attrib(Attr.java:3969) at com.sun.tools.javac.main.JavaCompiler.attribute(JavaCompiler.java:1317) at com.sun.tools.javac.api.JavacTaskImpl$1.process(JavacTaskImpl.java:468) at com.sun.tools.javac.api.JavacTaskImpl$Filter.run(JavacTaskImpl.java:618) at com.sun.tools.javac.api.JavacTaskImpl.analyze(JavacTaskImpl.java:471) at org.netbeans.modules.java.source.indexing.MultiPassCompileWorker.compile(MultiPassCompileWorker.java:261) at org.netbeans.modules.java.source.indexing.JavaCustomIndexer.index(JavaCustomIndexer.java:236) at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor$2.run(Indexable.java:161) at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runIndexer(RepositoryUpdater.java:266) at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor.index(Indexable.java:159) at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doIndex(RepositoryUpdater.java:2480) at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.access$1200(RepositoryUpdater.java:2048) at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$1.run(RepositoryUpdater.java:2372) at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$1.run(RepositoryUpdater.java:2370) at org.netbeans.modules.parsing.impl.indexing.errors.TaskCache.refreshTransaction(TaskCache.java:544) at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.index(RepositoryUpdater.java:2370) at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$AbstractRootsWork.scanSource(RepositoryUpdater.java:5042) at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$AbstractRootsWork.scanSources(RepositoryUpdater.java:4754) at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$RootsWork.getDone(RepositoryUpdater.java:4459) at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doTheWork(RepositoryUpdater.java:3067) at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task._run(RepositoryUpdater.java:5484) at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.access$4600(RepositoryUpdater.java:5150) at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$3$1.run(RepositoryUpdater.java:5409) at org.netbeans.modules.parsing.impl.RunWhenScanFinishedSupport.performScan(RunWhenScanFinishedSupport.java:96) at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$3.call(RepositoryUpdater.java:5405) at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$3.call(RepositoryUpdater.java:5401) at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176) at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360) at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:74) at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.run(RepositoryUpdater.java:5401) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1454) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2048)